It was 1986 when Mr N.Segredakis met with Mr G. Savvidis and together comleted successfully the port work of Nafpaktos. Since then and until today they build up together NSD reputation. NSD intention is to participate and support private or government projects, promoting technically off-shore construction and underwater projects.

Divers underwater works. In-water inspections approved by major Classification Societies. Approved by Class wet & dry welding. Maintenance of vessel's hull such as, U/W hull cleaning, propeller polishing,removal and/or blanking of gratings, waterproofing, measurements, anodes replacement. Underwater repairs and cofferdam solutions. Propeller's repairs & rebalancing. Damage surveys & Ship salvage. Pumping & Dredging.

SONAR & ROV research. Port related works, Pipelines, Cables, Harbour Constructions